add: Thunar executable button

Author: ikr4-m

Troubleshooting/thunar_execute.md

@@ -0,0 +1,12 @@
+This markdown will telling how to show "Execute" button in Thunar.
+
+# How To
+1. Close thunar
+```
+thunar -q
+```
+2. Enable execute button
+```
+xfconf-query --channel thunar --property /misc-exec-shell-scripts-by-default --create --type bool --set true
+```
+3. Done